Introducing Claude Sonnet 5.5
The release of Claude Sonnet 5.5 from Anthropic was recorded on 28 Sep 2026. The context window is 1,000,000 tokens. The maximum output is 128,000 tokens. Pricing is $2.00 per million input tokens and $10.00 per million output tokens. 18 evidence links.
Facts as of
- Context window
- 1,000,000
- Input · USD / 1M tokens
- $2.00
- Output · USD / 1M tokens
- $10.00
- Max output
- 128,000
- Input
- text · image
- Output
- text
- Cached input · USD / 1M tokens
- $0.10
Alex's take
Evidence links 18
- Claude Code · model idsevidence linknpmjs.com
- Anthropic APIevidence linkdocs.anthropic.com
- Vertex AI · Model Gardenevidence linkconsole.cloud.google.com
- Anthropic · site pagesevidence linkanthropic.com
- OpenRouterevidence linkopenrouter.ai
- Vercel AI Gatewayevidence linkvercel.com
- Anthropic · deprecationsevidence linkplatform.claude.com
- OpenRouterevidence linkopenrouter.ai
- OpenCode · discoveryevidence linkopencode.ai
- Artificial Analysis · benchmarksevidence linkartificialanalysis.ai
- OpenCode Zen · modelsevidence linkopencode.ai
- Command Code · modelsevidence linkcommandcode.ai
- Claude Docsevidence linkplatform.claude.com
- DesignArena · uicomponentevidence linkdesignarena.ai
- DesignArena · websiteevidence linkdesignarena.ai
- Anthropic · API pricingevidence linkplatform.claude.com
- models.dev · catalogueevidence linkmodels.dev
- models.dev · catalogueevidence linkmodels.dev
Related signals
AnthropicSightingClaude Haiku 5.5 (Max, Default Fallback) enters at 43.4 on the Intelligence Index
Confirmed20 evidence links